Hydraulic press



Aug. 28, 1945. E. T. MASCULIN HYDRAULI C PRES S Filed OG t. 18, 1944 3Sheets-Sheet E. T. MASCULINE Aug. 28, 1945.

HYDRAULIC PRES S F1194 001. 18) 1944 As sheets-guest 2 Attorneys Aug.28, 1945.

E. T.`MAscUL|NE HYDRAULIC PnEss Filed ont. 18, 1944 3 Sheets-Sheet 3 Imkentor idw/2f ze I By WWW

Patented Aug. 28, 1945 assasio Fica HYDRAULIC rnnss y Eawm rfmseune.snel-mm om, celu. Application october 1s, 1944, serial No. 559,313

' (cl. is-ie) 7 Claims.

This invention relates .to a hydraulic press, andv more particularly-tos uch a .press adapted to the forming of articles adapted to be-fmoldedunder pressure.

A primary object of this invention is the provision of an improvedhydraulic press having means associated therewith whereby hydraulicpressure, may be introduced into a pressure head thereof to form anarticle.

An additional object is the provision of such a press having improvedlocking means'assoprised of a head portion 2|, and a counterbalancingtank 22. Head portion 2| is comprised of a rectangular receptacleprovided, at its lower face, adjacent base with a. diagram 23 secured influid-tight relation about theedges of thereceptacle 2 l, and preferablycomprised of two or more layers' of rubber 24 and 25, or the like, the

ciated therewith for holding the pressure head in association with thebase.

An additional important object is the provision-of improved means forcontrolling the hydraulic pressure in such apressure head.

- Still another important object is the provision of such a press whichwill be sturdy and durable layers having different characteristics, as,for example, .layer 25 being an inner llayer of relatively tough, heavyrubber adaptedto form ar- Y ticles provided with corners and the likewithout damage to the diaphragm. and the outer layer Iheing formed ofsofter material adapted readily to mold the material being formed.

The tank 22 is provided at its lower extremity with a slide valve 30,and is also provided with an overow pipe 3|, adaptedto return anyoverflowing iiquid therein to the reservoir I5..

in construction, reliable and eilicient in operation,

and relatively simple and inexpensive .to manufacture, assemble andoperate.

Other objects reside in the combinations of elements, arrangements pfparts,` and features of construction, all as will be more fullypointedout and disclosed in the accompanying drawings, wherein there-isshown a preferred embodiment vof this inventive concept.

.In the drawings: i'

Figure 1 is a top plan view of one form of device embodying ieatures ofthis invention, certain concealed parts thereof being indicated bydotted lines.

ture shownin Figure 1.

Figure 3 is a sectional view taken substantiallyE --along the centerline of Figure 1, showing the parts in different positions ofadjustment, and

Figure 4 is a fragmentary sectional view showing the constructionaldetail.

Like refencenumerals refer to like parts throughout the several views ofthe drawings.

Having reference now to the drawings, there is shown at I a standard, orsupport, carrying at its upper extremity a base Il comprised of atroughlikemember within which is adapted to 2 is a side elevational viewof the struc- I spe'ctively. lead 'to pressure joints 40 and 4 l, fromwhich ioints inlets 42 'and 48, respectively, lead be positioned-aformer 2. Standard I0 has atransverse supporting plate |8- thereacrossvadapted to support an electric driving motor I4, and other mechanism tobe described more fully hereinafter.. A reservoir 5 for hydraulic iluid,such as water, oil or the like, is ,positioned adjacent the base ofstandard-l0.

Pivotally secured to the base Il, as by pin I6 engaging in lugs Ilcarriedv by base |I, is a pressure head generally indicated at 2l com-`pivot l From reservoir 'I5 inlets, one of which is shown at 35, leads topumps and 31, the inlet to pump Y 3l being indicated at 35a in Figure 1.The pumps 38 and 3.1 are adapted to be supported by transv verse plateI3 and driven by motor I4. Pump 36- and pumpy is 'a high volume. low,pressure pump, 31 is a low volume, highpressure pump, the pur-y pose andthe utility of which will be more fully pointed out hereinafter. Frompumps 44 and ll pipes 38 and 39, re-

to the interior of pressure head 2|. Valves 44 and '45 are provided inlines 38 and 39, respectively, which valves may be either manually or y1 automaticallycontrolled in any desired manner.

As best shown in Figure 4, the member 40 comprises a cap 5B secured atthe end of pipe 38, from 'which a transverse` Sleeve Il, provided with ailange 52, between which flange and the wall .of cap a pressure packingmay be provided, extends to a second cap 53, within which a flange 54is' also secured, the'cap 53 being positioned on the extremity of outletpipe 42, thus effecting a' relatively fluid-tight, high pressure-jointbetween the pipes 38 and 42, the arrangement being such that the partsmay pivot as the with respect to the base member |I.

From the interior of pressure head 2| an outlet line 55 extends to apoint adjacent th'e bottom of counterbalancing tank 22. Line 55 isprovided with a valve il, which may be either manually v operable or of.a type designed to open when apredetermined pressure is achieved Withinpressure'head 2|, thel valve being accessible through an aperture Il inthe wall ofballast reservoi;` 22;

Means are provided'for locking the-pressure member 20 pivots head 2| inrelated assembly with the base il, such means taking the form of spacedlugs 60 positioned at spaced points about the periphery of head 2| andprovided with` apertures adapted to be aligned with corresponding4apertures in posed extensions 63 secured'to thepins 62 and having theiropposite extremities secured to bars, or rods, 64. Bell crank members 65are pivotally secured, as by pivots 66, at three corners oi the base tothe extending legs of which' the ends oi adjacentrods 64 are secured, asby slot and pin connections 61. The arrangement is such that pivotalmovement of any one of bell crank levers 65 will move the extremities ofthe rods 64 associated therewith, to move'the associated pins 62. Suchmovement of the rods is transmitted to the bell crank members secured totheir opposite ends, to correspondingly move the other of rods 64associated with the last-mentioned bell crank member, wherebysimultaneous insertion and removal of the pins 62 'in their associatedapertures is eiected by one movement of one of the bell crank members65, or alternatively, one of therods 6F..

Now, from the foregoing the operation of the device sh'ould be readilyunderstandable. The former |2 is iirst placed in position in base Il,and the material to be molded placed thereover. The water is thendrained from tank 22 by opening valve 3|), whereupon the natural weightof pressure head 2| will cause the same to fall by gravity into positionover former I2, whereupon the pins 62 are moved to engage the aperturesin lugs 60 and 6| to lock the pressure head secureLv in position.

The motor Il is then started, which draws hydraulic uid through theinlets 35 and 35a, the low pressure, high' volume pump 36 servingquickly to nll the pressure head 2| to force the diaphragm 23 downwardlyover the former I2. After the low pressure capacity of the pump 36 isexhausted, the high pressure'pump 31 takes over, forcing more and morehydraulic uid into the head 2|, and successively increasing the pressuretherein to rmly mold and form the desired' article. It isy to be notedYthat a one-way valve may be positioned in the inlet line 38 or the lowpressure pump 36 to preclude forcing of hyi draulic iluid backtherethrough during the operation of high pressure pump 3i.

The operation of the pump 31 continues until the ,pressure has reachedthe desired point, whereupon the valve 56 ni'ay be opened, eithermanually or automatically, upon the achievement of the predeterminedpressure, whereupon the fluid is permitted to escape from the pressure.

head 2l into the tank 22. After the article has been formed, the pins 62are released in aimanner previously described, whereupon the weight oithe water in tank 22 serves to move the device to the open position,shown in Figure 3 by gravity.

`The formed article may then be removed from the former I2, and theoperation successively repeated' as desired.

Now, from the foregoing it will be seen that there is herein provided a'hydraulic press which accomplishes all the objects of th'is invention,and others, including manyadvantages of'great practical utility andcommercial importance.

As'many embodiments may be made of` this inventive concept, and as manymodications may be made in the embodiment hereinbefore shown anddescribed, it is to be understood that all matter herein is to beinterpreted merely as illustrative and not in a limiting sense.

\ I claim:

1. In a hydraulic press, in combination, a base, a pressure head pivotedthereto, a diaphragm in said pressure head, a counterbalancing tankmounted with saidhead on said base, a reservoir, means forl forcinghydraulic iiuid from said reservoir into said head to move saiddiaphragm, said means vincluding a high volume, low pressure pump, and alow volume, high pressure pump, and means t0 drain ,hydraulic nuid fromsaid head to said tank.

2. In a hydraulic press, in combination, a base, a pressure head pivotedthereto, a diaphragm in said pressure head, a counterbalancing tankmounted with said head on said base, a reservoir, means for forcinghydraulic iluid from said reservoir into said head tomove saiddiaphragm, means to drain the iluid yfrom said head to said tank, andmeans to return said iluid from said tank to said reservoir.

3. In a hydraulic press, in combination, a base, a pressure head'pivotedthereto, a diaphragm in said pressure head,` a counterbalancing tankmounted with said head on said base, a reservoir, means for forcinghydraulic iluid from said reservoir into said head to move saiddiaphragm, said means including a high volume, low pressure pump, and alow volume, high pressure pump, means to drain hydraulic iluid from saidhead to said'tank, and means to return said iluid from said tank to saidreservoir, said last-mentioned means including a valve positioned in thebase of said ballast tank.

,4. In a hydraulic press, in combination, a base,

mounted with said head on said base, a reservoir,

means for forcing hydraulic iiuid from said reservoir into said head tomove said diaphragm, means to drain the uid from said head to said tank,and lock means to secure said head to said base, said lock'meansincluding a plurality' of apertured lugs on said base and said head, andpins adapted to be passed through said apertures.

6. In a hydraulic press, in combination, a base,

a pressure head pivoted thereto, a-diaphragm in .said pressure head, acounterbalancing tank mounted' with said head 'on said base, areservoir, Ameans for forcing hydraulic fluid from said reservoir intosaid head to move said diaphragm, means to drain the uid from said headto said tank, lock means to secure said head to said base, said lockmeans including aplurality of apertured lugs on said base and said head,.pins adapted to be 'passed through said apertures, and means forsimultaneously engaging and disengaging all of said pins with saidapertures.'

7, In a hydraulic press, in combination, a base,l apressure head pivotedthereto, a diaphragm in said pressure head, a counterbalancing tankvoir, means for forcing hydraulic iiu'id from said `reservoir into saidhead to ,move said diaphragm,

means to drain the iuid from said` head to said tank, lock means tosecure said head to said base, saidlock means including a plurality o!apertured lugs on said base and4 said head, pins adapted to be passedthrough said apertures, and means for simultaneously engaging anddisengaging all of said pins with said apertures, said means in-lcluding a plurality of rods carrying said pins, and bell crank leversassociated with said rods for simultaneously moving all of said rods.

v EDWIN T.MASCULINE.

